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<TITLE> 	Part 4. Abstractions Layer</TITLE>
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<A NAME="pgfId-1096814"></A>Part 4. Abstractions Layer</H6>
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<A NAME="pgfId-1096816"></A>Abstraction Layer defines a set of meta-model elements whose purpose is to represent domain-specific and application-specific abstractions, as well as the engineering view of the exsting software system. The meta-model elements of the Abstractions Layer  provide various containers and groups to other meta-model elements.</P>
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<A NAME="pgfId-1096968"></A>Abstractions Layer defines the following 3 KDM Models:</P>
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<A NAME="pgfId-1096969"></A>Structure</LI>
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<A NAME="pgfId-1096970"></A>Conceptual</LI>
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<A NAME="pgfId-1096971"></A>Build</LI>
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<A NAME="pgfId-1096972"></A>&nbsp;</P>
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